Manufacture of artificial silk



June 7, 1927. 1,631,835

F. W. SCHUBERT MANUFACTURE OF ARTIFICIAL SILK Filed June 21, 1926 Patented June 7,1927;

UNITED STATES PATENT OFFICE.

FRIEDRICH WILHELM SCHUBERT, F APPERLEY BRIDGE, NEAR BRADFORD, ENG-' LAND, ASSIGNOR T0 BRYSILKA, LIMITED, OF APPERLEY BRIDGE, NEAR BRAD- FORD, ENGLAND.

Application filed June 21, 1926, Serial No.

This invention relates to the manufacture of artificial silk by the cuprammonium procwhich will permit the empty and full shellsor tubes being readily changed whilst en- 1 suring of them being firmly held during their rotations in the spinning machine.

According to the invention each bobbin comprises a frame or spider and a shell with means for frictionally holding the shell to the frame or spider when placed in position thereon. In an embodiment of the invention the frame or spider may comprise, two three-armed end pieces with slotted or recessed connecting members or bars between.

Into the slots or recesses may be fitted spiral springs which normally tend to expand radially so as to grip the internal periphery of the shell or tube at spaced points. The springs may ,be fitted with rubber sheaths and the arrangement may be such that as the empty sleeve or shell is placed in position the springs will be compressed within the slots or recesses into the plane of the bars, whilst whem the shell or tube is removed they will protrude to form curved or arcuate rotuberances.

In or er that the invention may be clearly.

understood and readily carried into effect,

the same will now be more full described with reference to and by the ai of the accompanying drawings; wherein Figures 1 and 2 are respectively a side elevation and transverse section of a bobbin frame or spider fitted with means for frictionally holding a shell in position thereon. Figure 3 is an end elevation of the frame or spider with a shell in position thereon. F1gures 4 and 5 are respectively an end elevation and longitudinal section of one of the frictional shell retaining means or elements.

Referring to the drawings, the frame or spider comprises twothree-armed end pieces 1, connected together by three longitudinally disposed members or bars 2, which are formed with slots or recesses 3, adapted to be fitted with means for frictionally'hold- MANUFACTURE OF ARTIFICIAL SILK.

117,537, and in Great Britain July 2, 1925.

ing or retaining the cylindrical ebonite or sleeve or shell 4, is placed in position on the frame or spider the spring members 5 are compressed within the said slots or recesses 3 into the plane of the bars 2, as shown at Figlure 3, whilst when the shell 4 is removed t e'said-spring members'5 will again protrude to form curved or arcuate, protuberances as shown at Figures 1 and 2.

The three-armed end ieces 1 are formed with centrally disposed carrying short axles or shafts 7, through the mediumof which the bobbin as a whole may be rotatably mounted.

I claim I 1. A winding bobbin comprising two end pieces, a plurality of bars connecting said end pieces, and each provided with a longi-' tudinally extending recess or slot, and a coiled spring arranged within each said re cess or slot and projecting radially therefrom at intermediate points in its length, for the purpose described.

2. A winding bobbin comprising two end pieces, a plurality of bars connecting said end pieces, and each provided with a longialigned bosses 6,

tudinally extending recess or slot, and a resilient member normally projecting radially from the recess or slot in each connecting bar, said member comprising a coiled spring enclosed in a flexible cover.

' 3. A winding bobbin comprising 1 two" v three armed end pieces, bars connecting the aligned arms of the head pieces and each having a longitudinally extending recess or slot formed therein, and a resilient member extending longitudinally of each said slot or recess and projecting radially therefrom at intermediate points in its length, each said member comprising a body of rubber like material having a coiled spring embedded therein. FRIEDRICH WILHELM SCHUBERT. 

